When I was a high school student, I read “Artificial Life” by Stephen Levy and got really into alife. The book had snapshots of a daughter of Codd’s CA, Langston’s loops, on its book sleeve. I was able to back up some of the rules and then deduce what the others were to repro this CA. I still chase that feeling I got from doing this.

How does this differ from Langton’s Loops? The two wiki articles don’t seem to reference each other.